<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        aside {
            width: 287px;
            color: white;
            background-color: saddlebrown;
        }
    </style>
</head>
<body>
    <aside>
        <form method="get">
            <fieldset>
                <legend>
                    Flight order
                </legend>
                <label for="from-city-select">From</label>
                <select id="from-city-select">
                    <option disabled selected>
                        enter a city
                    </option>
                    <option>
                        София
                    </option>
                </select>
                <label for="to-city-select">To</label>
                <select id="to-city-select">
                    <option disabled selected>
                        enter a city
                    </option>
                    <option>
                        Варна
                    </option>
                </select>
                <label for="prefer-directs">Prefer directs</label>
                <input type="checkbox" id="prefer-directs" />
                <label for="departure-date">Departure date</label>
                <input type="date" id="departure-date" />
                <label for="time-interval-departure">Time interval</label>
                <input type="time" id="time-interval-departure" />
                <input type="time" />
                <label for="return-date">Return date</label>
                <input type="date" id="return-date" />
                <label for="time-interval-return">Time interval</label>
                <input type="time" id="time-interval-return" />
                <input type="time" />
                <label for="12+">12+</label>
                <input type="number" id="12+" />
                <label for="2-12">2-12</label>
                <input type="number" id="2-12" />
                <label for="0-2">0-2</label>
                <input type="number" id="0-2" />
                <label for="choose-class">Choose class</label>
                <select id="choose-class">
                    <option>
                        Standard
                    </option>
                </select>
                <input type="submit" value="Search" />
            </fieldset>
        </form>
    </aside>
</body>
</html>